Long-baseline quasi-real time kinematic GPS data analysis for early tsunami warning

Long-baseline quasi-real time kinematic GPS data analysis for early tsunami warning
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海啸早期预警的长基线准实时运动 GPS 数据分析

DOI:
10.1186/bf03352877
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发表时间:
2008
期刊:
Earth, Planets and Space
影响因子:
--
通讯作者:
T. Kato
T. Kato
中科院分区:
--
文献类型:
--
作者:
M. E. Daud;T. Sagiya;F. Kimata;T. Kato

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真实的实时监测远离海岸的海洋中的波高可以有助于减轻海啸灾害。在这里,我们证明了破坏性海啸的早期检测可以实现使用一个新的长基线动态GPS方法,通过跟踪海面高度的异常变化。以准实时模式监测了GPS浮标相对于基线长度为500公里的基站的运动,并成功地解决了2004年9月5日日本纪伊半岛外地震引起的海啸波。通过对8d的GPS浮标观测数据的连续分析,得到了台风和平静天气下,经潮汐校正后的低通滤波后的1 Hz GPS浮标高度的平均散射值分别为3.4cm和1.2cm。即使在台风条件下,这一精度也足以探测到振幅超过30厘米的海啸波。较长的基线可以确保居住在海岸的人们有足够的疏散时间。
Real time monitoring of wave height in the ocean far from the coast can contribute to mitigation of a tsunami disaster. Here we demonstrate that early detection of a damaging tsunami can be achieved using a new long baseline kinematic GPS method, by tracking the anomalous changes in sea surface heights. The movement of a GPS buoy relative to a base station with a baseline length of 500 km has been monitored in quasi-real time mode, and the tsunami waves caused by the 5 September 2004 Off Kii Peninsula earthquake, Japan, have been successfully resolved. Based on the continuous analysis of GPS buoy data for 8 days, the average scattering of the low-pass filtered 1-Hz GPS buoy heights after tidal correction are about 3.4 cm and 1.2 cm for typhoon and calm weather, respectively. That is precise enough to detect tsunami waves with an amplitude of over 30 cm even under typhoon conditions. The long baseline can ensure an adequate evacuation time for people living on the coast.
DOI: 10.1186/bf03353372
发表时间: 2006-02
期刊: Earth, Planets and Space
影响因子: --
作者:
Y. Ohta;I. Meilano;T. Sagiya;F. Kimata;K. Hirahara
通讯作者: Y. Ohta;I. Meilano;T. Sagiya;F. Kimata;K. Hirahara
海上监测系统记录了日本最北端岛屿最近发生的地震
DOI: --
发表时间: 2004
期刊: EOS Trans. 85
影响因子: --
作者:
Yatanabe;T.;H.Matsumoto;H.Sugioka;H.Mikada;K.Suyehiro;R.Otsuka
通讯作者: R.Otsuka